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Displaying 51 - 75 of 126

Spectral Characterization of HST Calibration Lamps - New Pt/Ct-Ne Line Catalogues and Ageing Test

June 25, 2004
Author(s)
F Kerber, Michael R. Rosa, Craig J. Sansonetti, Joseph Reader, Gillian Nave, P Bristow, M Fiorentio, G Lercher
The Space Telescope European Coordinating Facility's (ST-ECF) lamp project, funded directly by the European Space Agency (ESA), is dedicated to the study of hollow cathode calibration lamps as they are used onboard the Hubble Space Telescope (HST). There

Precision Wavelength Metrology with a Fourier Transform Spectrometer

June 1, 2003
Author(s)
D. Veza, Marc L. Salit, John C. Travis, Craig J. Sansonetti
We have investigated the intrinsic accuracy of the optical frequency scale in spectra acquired by a Fourier Transform Spectrometer (FTS). The uncalibrated accuracy of the FTS optical frequency axis is about 1 part in 10 5. This uncertainty can be reduced

2 2 S 1/2 Transition of Atomic Lithium by Doppler-Free Two-Photon Spectroscopy

January 1, 2003
Author(s)
W DeGraffenreid, Craig J. Sansonetti
We have investigated the 2 2S1/2 - 4 2S1/2 two-photon transition in atomic lithium by high resolution laser spectroscopy. The frequencies of the two-photon resonances have been measured with an accuracy of better than 1 MHz using our Fabry-Perot wavemeter

Wavelength Standards in the Ultraviolet

September 1, 2002
Author(s)
Gillian Nave, Craig J. Sansonetti
We have made accurate wavelength measurements for lines of Pt 1 and II, Fe I, Ge I, and Kr II in the region 1800 to 3100 . New microlithography tools that are currently coming into production use are based on the ArF excimer laser which operates at a

Infrared Spectra of the Noble Gases

August 1, 2002
Author(s)
Craig J. Sansonetti, M M. Blackwell, Edward B. Saloman
The Atomic Spectroscopy Data Center of the National Institute of Standards and Technology (NIST) is currently compiling spectra and energy levels of the noble gases. A review of the literature has shown that there is no comprehensive experimental

Radiometry of Low-Pressure Hg-Ar Discharges

August 1, 2001
Author(s)
Craig J. Sansonetti, Joseph Reader
New fluorescent lamp designs employ Hg-Ar discharges under operating conditions that differ significantly from those found in conventional fluorescent tubes. We have studied the radiant output of Hg-Ar discharges over a wide range of Ar pressure, Hg vapor
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